package com.itheima.reggine.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggine.common.BaseContext;
import com.itheima.reggine.common.CustomException;
import com.itheima.reggine.entity.*;
import com.itheima.reggine.mapper.OrderMapper;
import com.itheima.reggine.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Runqiang Jiang
 * @create 2022/4/22 16:20
 */
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
   @Autowired
    private ShoppingCartService shoppingCartService;
   @Autowired
   private UserService userService;
   @Autowired
   private AddressBookService addressBookService;

   @Autowired
   private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    public void submit(Orders orders) {
        // 获得当前用户的id
        Long userId = BaseContext.getCurrentId();

        // 查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        if(shoppingCarts==null|| shoppingCarts.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        // 查询用户数据
        User user = userService.getById(userId);
        // 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null){
            throw new CustomException("用户地址信息有误，不能下单");
        }
        long orderid = IdWorker.getId();// 订单号
        // 原子操作 保证多线程的情况下是没有问题的 保证线程是安全的
        AtomicInteger amount=new AtomicInteger(0);
       List<OrderDetail> orderDetails= shoppingCarts.stream().map((item)->{
           OrderDetail orderDetail = new OrderDetail();
           orderDetail.setOrderId(orderid);
           orderDetail.setNumber(item.getNumber());
           orderDetail.setDishFlavor(item.getDishFlavor());
           orderDetail.setDishId(item.getDishId());
           orderDetail.setSetmealId(item.getSetmealId());
           orderDetail.setName(item.getName());
           orderDetail.setImage(item.getImage());
           orderDetail.setAmount(item.getAmount());
           amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
           return orderDetail;

       }).collect(Collectors.toList());


        // 向订单表插入数据，1条数据
        orders.setNumber(String.valueOf(orderid));
        orders.setId(orderid);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));// 总金额
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据

        this.save(orders);


        // 向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        // 清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
